The whole end of speech is to be understood.

In antiquity men studied for their own sake; nowadays men study for the sake of impressing others.

What you do not want done to yourself, do not do to others.

All men are born good.

those who understands is not better than those who appreciates, those who appreciates is not better than those who enjoys.

The nobler sort of man emphasizes the good qualities in others, and does not accentuate the bad. The inferior does.

Rotten wood cannot be carved.